<%--
  Created by IntelliJ IDEA.
  User: Albert Lee
  Date: 2020/5/26
  Time: 16:38
  To change this template use File | Settings | File Templates.
--%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%@ page import="java.sql.*"%>

<%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

        <base href="<%=basePath%>"> 
        <title>按年龄查询</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">

    <!--

    <link rel="stylesheet" type="text/css" href="styles.css">

    -->
      </head>

  <body >

    <%

    request.setCharacterEncoding("UTF-8");
    String age = request.getParameter("age");
    Connection conn = null;

          Statement stat = null;

    ResultSet rs = null;

   Class.forName("com.mysql.cj.jdbc.Driver");

   String url = "jdbc:mysql://localhost:3306/student";

   String user = "root";

    String password = "123456";
    conn = DriverManager.getConnection(url,user,password);
    stat = conn.createStatement();
    rs = stat.executeQuery("select * from stu where age=" + age + "");

    %>

    <br>
        <h3>符合条件的学生信息</h3><hr>
    <br>

     <table width="450" border="100" cellSpacing=1 style="font-size:15pt;border:dashed 1pt">

        <tr>
        <td>学号</td>
        <td>姓名</td>
        <td>年龄</td>
        <td>性别</td>
        <td>专业</td>
        </tr>

        <%

    while(rs.next())

    {

    out.print("<tr>");

    out.print("<td>" + rs.getInt("id") + "</td>");

    out.print("<td>" + rs.getString("name") + "</td>");

    out.print("<td>" + rs.getInt("age") + "</td>");

    out.print("<td>" + rs.getString("gender") + "</td>");

    out.print("<td>" + rs.getString("major") + "</td>");
%>


    <td><a href="delete.jsp?id=<%=rs.getInt("id") %>">删除</a></td>
    <td><a href="update.jsp?id=<%=rs.getInt("id") %>">修改</a></td>

    <%
            out.print("</tr>");
        }
    %>

      </table>
      <br>
      <br>
       <h4><a href=showInfo.jsp>返回查询页面</a></h4>

      <%

    if(rs != null) {
    rs.close();
    rs = null;
    }

    if(stat != null) {
    stat.close();
    stat = null;
    }

    if(conn != null) {
    conn.close();
    conn = null;
    }

%>

  </body>
</html>